Author Topic: Q? 12-bolt 3.07 rearend came with what engine/trans combo  (Read 2036 times)

JKZ27

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Re: Q? 12-bolt 3.07 rearend came with what engine/trans combo
« Reply #15 on: January 25, 2018, 02:42:51 AM »
No mention of the 307 or L78 either, among others.
John
69 RS/SS Cortez Silver, L48 MC1
68 RS Ash/Ivy Gold 327EFI M20

william

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Re: Q? 12-bolt 3.07 rearend came with what engine/trans combo
« Reply #16 on: January 25, 2018, 06:47:09 PM »
There is a chart that lists all RPO engines. It was part of the dealer ordering info. As Kurt and Bryon have noted it changed throughout the model year making 'a' chart complicated.

To answer the original question, a 3.07 posi was the standard ratio with a few engine/trans combos. It was optional on many others including the Z/28. By itself, not an indicator of the original engine.

starcruser

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Re: Q? 12-bolt 3.07 rearend came with what engine/trans combo
« Reply #17 on: January 25, 2018, 08:32:04 PM »
I have a 69 Camaro with 3.07 12 bolt same as yours. My car is original and it is a X11 SS-350. The engine code is HB.
Long time Camaro man.

william

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Re: Q? 12-bolt 3.07 rearend came with what engine/trans combo
« Reply #18 on: January 26, 2018, 01:58:48 PM »
At one point, std ratio for an L48/TH350.

rare396bronze

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Re: Q? 12-bolt 3.07 rearend came with what engine/trans combo
« Reply #19 on: January 28, 2018, 06:16:25 PM »
My 68 396/325 HP 4speed came from factory with 307 gear. Changed ring and pinion to 3.55 ratio but kept 3.07 gear in case i wanted to go back.